Hi,
I don't know if this has been asked before elsewhere or if it is in the pipes already or if there is a way to access already that I don't know of, but I would love to have the matrix class ( https://ruby-doc.org/stdlib-2.5.1/libdoc/matrix/rdoc/Matrix.html ) available. I know DragonRuby is a ( fantastic ) 2D framework, but for many pseudo-3D effects, matrices are necessary.
I rolled out my own matrix class written in full Ruby but it is way to slow and doesn't scale well. I am sure there is room for optimisation in that Ruby code, but probably nothing that would beat a pure, even naive, C implementation.
-jujule